VA inpatients, outpatients, or nursing home residents at the participating sites who have any of the following wounds: (1) chronic pressure ulcers at stage II, III or IV; (2) post-operative wound patients having undergone a skin flap procedure for a grade III or IV pressure ulcer; (3) diabetic wounds; (4) arterial ulcers; or (5) chronic venous status ulcers. Exclusion criteria: Mentally incompetent patients.